EP 1318282 A1 20030611 - Exhaust gas purification device
Title (en)
Exhaust gas purification device
Title (de)
Abgasreinigungsanlage
Title (fr)
Système de purification de gaz d'échappement
Publication
Application
Priority
JP 2001374828 A 20011207
Abstract (en)
An exhaust gas purification device (12) having a NOx absorbent (12) includes a by-pass passage (18) for by-passing the NOx absorbent, exhaust gas flow rate control means (22) for regulating both a flow rate of exhaust gas flowing to the NOx absorbent and a flow rate of exhaust gas by-passing the NOx absorbent, and reductant addition means (32) for adding reductant into an exhaust passage upstream of the NOx absorbent. In this device, when it is necessary to discharge sulfur components from the NOx absorbent, a temperature rise control is executed such that a temperature of the NOx absorbent is higher than a predetermined temperature. Then, a rich condition control is executed such that an air-fuel ratio of the exhaust gas flowing to the NOx absorbent becomes one of a substantially stoichiometric condition and a rich condition. The flow rate of the exhaust gas to the NOx absorbent during the temperature rise control is controlled so as to be higher than that during the rich condition control. <IMAGE>
IPC 1-7
IPC 8 full level
B01D 53/94 (2006.01); F01N 3/02 (2006.01); F01N 3/08 (2006.01); F01N 3/20 (2006.01); F01N 3/24 (2006.01); F01N 3/28 (2006.01); F01N 3/36 (2006.01); F01N 7/08 (2006.01); F01N 13/08 (2010.01); F02D 41/02 (2006.01); F02D 41/04 (2006.01); F02D 43/00 (2006.01); F02D 45/00 (2006.01); F01N 3/023 (2006.01); F01N 7/02 (2006.01); F01N 7/04 (2006.01)
CPC (source: EP US)
B01D 53/9431 (2013.01 - EP US); B01D 53/9495 (2013.01 - EP US); F01N 3/0233 (2013.01 - EP US); F01N 3/0842 (2013.01 - EP US); F01N 3/085 (2013.01 - EP US); F01N 3/0878 (2013.01 - EP US); F01N 3/0885 (2013.01 - EP US); F01N 13/0097 (2014.06 - EP US); F01N 13/011 (2014.06 - EP US); F02D 41/028 (2013.01 - EP US); F01N 2570/04 (2013.01 - EP US)
Citation (search report)
[A] FR 2796984 A1 20010202 - RENAULT [FR]
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
EP 1318282 A1 20030611; EP 1318282 B1 20041117; DE 60201960 D1 20041223; DE 60201960 T2 20050331; JP 2003176715 A 20030627; JP 3757856 B2 20060322; US 2003106306 A1 20030612; US 6823664 B2 20041130
DOCDB simple family (application)
EP 02026795 A 20021202; DE 60201960 T 20021202; JP 2001374828 A 20011207; US 30731102 A 20021202